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SwapGLM-5.3
Z.ai's GLM-5.3 is a very large model focused on coding and cyber tasks, free to download under restricted terms and needing powerful servers to run.
Release page →GLM-5.3-Flash
Z.ai's GLM-5.3-Flash is a large model free to download, aimed at developers who want strong answers at a lower running cost.
Release page →The basics
Released
What it does
Knowledge cutoff
The latest events it learned about
Download
Price and limits, for developers
Input
Per million tokens
Output
Per million tokens
Cached input
Per million tokens
Context window
How much it takes in at once
Longest answer
How they score
Combined test score
Epoch Capabilities Index · Epoch AI
GLM-5.3 scores 3 points higher.
Chat answers, by people's votes
LMArena text, adjusted for style · LMArena
Neck and neck: in blind votes, people pick each about as often as the other.
Building apps, by people's votes
LMArena WebDev · LMArena
Neck and neck: in blind votes, people pick each about as often as the other.
Green marks the better of the two on each row, red the other. Rows where one side isn't listed, or where the gap is too close to call, stay plain.
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Rankings from LMArena and Epoch AI, both CC BY 4.0, updated . Developer prices, context windows and knowledge cutoffs from the labs' own listings on models.dev and from OpenRouter. The app links go to each maker's own app when no source says exactly where the model is available.